Self validating web forms

These are normally executed when you call the is raised, the method should return the cleaned (normalized) data as a Python object.

Most validation can be done using validators - simple helpers that can be reused easily.

We will also do two more things when the user submits the form: The next step is to create a function that will do all the checking for us (which is much more convenient than writing the same code over and over again). Now, we can check each $_POST variable with the test_input() function, and the script looks like this: Notice that at the start of the script, we check whether the form has been submitted using $_SERVER["REQUEST_METHOD"].

If the REQUEST_METHOD is POST, then the form has been submitted - and it should be validated.

Some resources also refer to Jscript (Microsoft) and ECMAScript (European Computer Manufacturer's Association), but these are both derivatives of Java Script.

Since only Microsoft Internet Explorer supports VBScript, you'll probably choose Java Script as your primary scripting language to use on a user's computer.

Fields are single data points, forms are a collection of fields. If you want to customize this process, there are various places to make changes, each one serving a different purpose.Three types of cleaning methods are run during form processing.This increases performance and reduces traffic over the Web.A slightly negative aspect of validating data on the user's computer is that the validation is performed via a script residing in the Web page. You only have two possible scripting languages that you can use on a user's computer: VBScript or Java Script.As a secondary goal, I wanted to finally get started on building my own web control library. You can open a web control project, and start coding. This will save you heartache later if you keep the namespace names the same as the project names.